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Synthesis of iron oxide nanoflakes at lower temperature by air oxidation of iron foils

Mohamed Rashid, Norhana and Li, Xuyang and Kishi, Naoki and Soga, Tetsuo (2014) Synthesis of iron oxide nanoflakes at lower temperature by air oxidation of iron foils. Japanese Journal of Applied Physics, 53 (11). ISSN 0021-4922

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Official URL: http://dx.doi.org/10.7567/JJAP.53.11RE04

Abstract

Iron oxide α-Fe2O3 nanoflakes have been synthesized on iron foil by a simple air oxidation process. Dry air flows constantly over the iron foils during the oxidation process in the temperature range of 350–600 °C with annealing periods of 1–6 h. Large quantities of nanoflakes with average tip and bottom diameters of 40 and 140 nm, respectively, and average lengths of 200 nm were obtained at a temperature of 450 °C and 6 h of annealing. These nanoflakes had a preferential growth direction of (110) with a 0.25 nm fringe spacing. Their surface morphology, phase purity, and crystal structures were confirmed by scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM) analysis. Good-quality iron oxide nanoflakes can be obtained by optimizing the growth temperature and annealing period. Surface diffusion of iron atoms and iron oxide molecules was believed to be the growth mechanism of the nanoflakes because of the low oxidation temperature used.

Item Type:Article
Uncontrolled Keywords:x-ray diffraction (XRD), transmission electron microscopy (TEM)
Subjects:T Technology > TN Mining engineering. Metallurgy
Divisions:Petroleum and Renewable Energy Engineering
ID Code:62790
Deposited By: Fazli Masari
Deposited On:15 Jun 2017 08:57
Last Modified:15 Jun 2017 08:57

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